The correct answer is A. The 200 randomly selected students
Explanation:
In most studies, the complete population is not surveyed or studied instead, a specific number of individuals are selected, this group is known as the sample. Additionally, the sample represents the population, and due to this, their answers are used to make inferences about all the population.
According to this, the population is all the students in the school, while the sample is the 200 randomly selected students because this is the group that is going to be studied to make conclusions and inferences about all the population.
Answer:
90
Step-by-step explanation:
A group of 10 people is choose a chairperson and vice-chairperson. They put all 10 peoples names into a bar. The first name drawn becomes chair. The second name drawn becomes vice-chair. How many possible combinations of chair and Vice-chair are there ?
This is calculated using the Permutation formula
nPr = n!/(n - r)!
Where:
n = 10 people
r = 2 = 2 positions to be filled , Chairman and Vice chairman
Hence:
10P2 = 10!/(10 - 2)!
= 90 ways
<span>15/6 + 4/6 +n = 1/6
18/6 = n
n=3
</span>
So for this we're going to use this rule: a/b x c/d = ac/bd
simplify 1 x 1 to 1
simplify 4 x 4 to 16
4 x 1/16 to 4/16
simplify 4/16 to 1/4
simplify to 6/4
Lastly simplify
Answer: 3/2
*In decimal form it would be 1.5
